Date: Wed, 12 Oct 2016 02:46:17 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: James Gritton <jamie@freebsd.org>, freebsd-jail@freebsd.org Subject: Re: some (random) jails are not started after reboot Message-ID: <57FD87D9.4050209@quip.cz> In-Reply-To: <7c2f0434326257c5d2cbbb97a5c5e787@gritton.org> References: <57F63D18.1060701@quip.cz> <7c2f0434326257c5d2cbbb97a5c5e787@gritton.org>
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James Gritton wrote on 2016/10/06 18:11: > On 2016-10-06 06:01, Miroslav Lachman wrote: [...] >> This is production machine so I can't play with it too much. But does >> anybody else seen it too? >> How can I debug it on next reboot? > > Two handy things. One is to make sure every jail has an exec.consolelog > file set, so if it gets partway through startup and then goes away, you > can see what it did up until then. Second is the "-v" flag to jail(8). > Add it to jail_flags in your rc.conf, and then comment out the bit in > /etc/rc.d/jail that removes the temp file for jail(8)'s output ($_tmp). > Watch out for parallel starts - they just went to /dev/null until recently. Thank you for your advice. I added -v flag and commented out rm $_tmp We are not using parallel start. I rebooted server tonight and another jail didn't start. Nothing was logged to jail's console log file But I found this in tmp file: # grep costa jail.rwe8dsFF costa: run command as root: /sbin/mount -t nullfs -o ro /vol0/jail/_basejail /vol0/jail/costa/basejail mount_nullfs: /vol0/jail/costa/basejail: Operation not supported by device jail: costa: /sbin/mount -t nullfs -o ro /vol0/jail/_basejail /vol0/jail/costa/basejail: failed This is strange, because all jails are using the same _basejail and I can manually mount this directory root@cage ~/# /sbin/mount -t nullfs -o ro /vol0/jail/_basejail /vol0/jail/costa/basejail root@cage ~/# mount | grep costa tank/vol0/jail/costa on /vol0/jail/costa (zfs, local, noatime, nfsv4acls) /vol0/jail/_basejail on /vol0/jail/costa/basejail (nullfs, local, read-only) root@cage ~/# umount /vol0/jail/costa/basejail And I can start the jail by rc script as well root@cage ~/# service jail start costa Starting jails: costa. Do you have any idea what is going on? Miroslav Lachman
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